to proceed to the united states. when he landed in los angeles, a customs agent noticed the unusual garb, checked his bag and police arrested him. >> he had a myriad of items in his checked-in luggage that raised a lot of suspicion. he had a gas mask, knives, handcuffs. >> reporter: still, it may surprise the average passenger, none of that frightening gear, not even the body bags in his luggage, is banned from planes. only a smoke grenade, also found in his checked luggage, is illegal, and the tsa is investigating how korean authorities let it get aboard. and while it could have produced plenty of smoke in the cabin, harris had no access to it in the cargo hull. it was not rigged to detonate on its own. >> weapons are found, bags left unattended, people go into quarantine areas, things like this happen all the time. >> reporter: police sources say harris told them upon his arrest, "this is a game." and while he was dressed for one, it's clearly not a game homeland security is willing to play. jim avila, abc news, washington. >>> and coming up here, do you remember the woman singing in t
